If the first draft is well written, it can be used as the final draft, and there is no need to modify it, but it is not recommended to modify it, because the more perfect the final draft, the better. You'd better not have someone write it for you. If you catch it, you may be disqualified.
The first draft of the paper, that is to say, the paper has not been finalized. It is also a document that has not passed the audit of relevant personnel. It refers to an unfinished paper, or just an outline, which needs to be further improved and supplemented. For example, some viewpoints deserve further scrutiny, some data need to be investigated, some arguments need to be supplemented, and some quotations need to be verified.
There are many kinds of papers, but they all have to go through the processes of data collection, collation, writing, drafting, finalization and approval. The first draft of the paper is a literary work that has not been officially recognized. Before it is finally passed, it can be revised and improved a lot. It is possible that the paper has been completed, but it has not passed the relevant review, which can also be called the first draft.